Still have some jugs of the "old" 15-50 Red Cap around - I use it in my air cooled 1200cc Suzuki Bandit. I tried some RTS 5w-40, but the shifting felt "notchy" so I went back to the M1, 15-50. It's a favorite of other Bandit owners too, according to the various forums.
Anyway, I also have some of the newer "Gold Cap" M1 15-50 Extended Performance, so I figured I'd send it off to Blackstone for a comparo with the old Red Cap.
Here we go: Red Cap SJ/CF
RON: This is serviceable 15W/50 oil. The TBN was 12.1, a good, high starting point. No moisture or insolubles present. The 1-ppm iron isn't a factor and is probably from tank rust somewhere along the distribution chain.
MI/HR ON OIL:
MI/HR ON UNIT:
DATE:2-4-08
ALUMINUM: 0
CHROMIUM: 0
IRON: 1
COPPER: 0
LEAD: 0
TIN: 0
MOLY: 76
NICKEL: 0
MANGANESE: 0
SILVER: 0
TITANIUM: 0
POTASSIUM: 0
BORON: 182
SILICON: 3
SODIUM: 7
CALCIUM: 2726
MAGNESIUM: 18
PHOSPHOROUS: 1137
ZINC: 1316
BARIUM: 0
SUS VISC. @210F: 85.2
Cst Visc. @100C: 16.81
Flashpoint: 470
Fuel %: —–
Antifreeze %: —–
Water %:0.0
Insolubles %:0.0
TBN: 12.1
TAN:
ISO Code:
And the EP Gold Cap: SL/CF
RON: There are only minor differences between these two Mobil oil products. This one has less boron in the additive group and the TBN was lower at 9.8. We think either of these oils should serve your engine's needs well.
DATE: 2-4-08
ALUMINUM: 0
CHROMIUM: 0
IRON: 1
COPPER: 0
LEAD: 0
TIN: 0
MOLY: 82
NICKEL: 0
MANGANESE: 0
SILVER: 0
TITANIUM: 0
POTASSIUM: 0
BORON: 99
SILICON: 5
SODIUM: 4
CALCIUM: 2261
MAGNESIUM: 12
PHOSPHOROUS: 1013
ZINC: 1201
BARIUM: 0
SUS VISC. @210F: 85.4
Cst Visc. @100C: 16.85
Flashpoint: 460
Fuel %: —–
Antifreeze %: —–
Water %: 0.0
Insolubles %: 0.0
TBN: 9.8
TAN:
ISO Code:
Anyway, I also have some of the newer "Gold Cap" M1 15-50 Extended Performance, so I figured I'd send it off to Blackstone for a comparo with the old Red Cap.
Here we go: Red Cap SJ/CF
RON: This is serviceable 15W/50 oil. The TBN was 12.1, a good, high starting point. No moisture or insolubles present. The 1-ppm iron isn't a factor and is probably from tank rust somewhere along the distribution chain.
MI/HR ON OIL:
MI/HR ON UNIT:
DATE:2-4-08
ALUMINUM: 0
CHROMIUM: 0
IRON: 1
COPPER: 0
LEAD: 0
TIN: 0
MOLY: 76
NICKEL: 0
MANGANESE: 0
SILVER: 0
TITANIUM: 0
POTASSIUM: 0
BORON: 182
SILICON: 3
SODIUM: 7
CALCIUM: 2726
MAGNESIUM: 18
PHOSPHOROUS: 1137
ZINC: 1316
BARIUM: 0
SUS VISC. @210F: 85.2
Cst Visc. @100C: 16.81
Flashpoint: 470
Fuel %: —–
Antifreeze %: —–
Water %:0.0
Insolubles %:0.0
TBN: 12.1
TAN:
ISO Code:
And the EP Gold Cap: SL/CF
RON: There are only minor differences between these two Mobil oil products. This one has less boron in the additive group and the TBN was lower at 9.8. We think either of these oils should serve your engine's needs well.
DATE: 2-4-08
ALUMINUM: 0
CHROMIUM: 0
IRON: 1
COPPER: 0
LEAD: 0
TIN: 0
MOLY: 82
NICKEL: 0
MANGANESE: 0
SILVER: 0
TITANIUM: 0
POTASSIUM: 0
BORON: 99
SILICON: 5
SODIUM: 4
CALCIUM: 2261
MAGNESIUM: 12
PHOSPHOROUS: 1013
ZINC: 1201
BARIUM: 0
SUS VISC. @210F: 85.4
Cst Visc. @100C: 16.85
Flashpoint: 460
Fuel %: —–
Antifreeze %: —–
Water %: 0.0
Insolubles %: 0.0
TBN: 9.8
TAN:
ISO Code:
